Sodium Clog

[reefwithareefer]

Does any one have the same issue as me. I dose my sodium every 4 hours. After a week or so the sodium starts hardening at the end of the tube, causing the tube to fully clog. I left the end of the tube out of the water and submersed it, either way it clogs.
Any solutions?

Not that I think it is relevant, but I use Randys 3 part, The tube ends for each part, are about 3 inches away from one another and each part is dosed hours apart from one another..